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Hgccvbhggggf
@Hgccvbhggggf
April 2019
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On donne l'expression a = (4x + 5) (x-6) -(4x-9)
A) développez etcreduire l'expression a
B) calculer a pour x = 3
C) calculer a pour x = -2
Il faut détailler merci beaucoup
PS = c'est des "x" et pas des fois :) ;)
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nonotata
(4x+5)(x-6) -(4x-9)
4x²-24x+5x-30 -4x+9
4x² -23x -21
pour x = 3
4(3)² -23(3) -21
4(9) -69-21
36-90
-54
pour x = -2
4(-2)² -23(-2) -21
4(4) +46 -21
16+46-21
60-21
39
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4x²-24x+5x-30 -4x+9
4x² -23x -21
pour x = 3
4(3)² -23(3) -21
4(9) -69-21
36-90
-54
pour x = -2
4(-2)² -23(-2) -21
4(4) +46 -21
16+46-21
60-21
39